There is no "good side in the spiritual". Spiritualism and spiritism are are as wicked as black magic. God gives us permission to eat meat. That's good enough for me.
If you want to be a vegetarian, fine. Don't try and guilt trip those who do not. There is no risk to eating meat. I'm 70, healthy and reasonably fit. The vast majority of people eat meat and people are living longer than ever.
Yes, God created us to be vegetarians. Adam and Eve did not need to cultivate crops, fruit was sufficient. However, after Adam fell, our metabolism changed. Jesus ate fish, almost certainly ate lamb and said nothing about not eating meat.
As always, God has the last word:
Colossians 2:16
"
Therefore let no one judge you by what you eat or drink, or with regard to a feast, a New Moon, or a Sabbath. These are a shadow of the things to come, but the body that casts it belongs to Christ.…"
Genesis 9:2-4
"The fear and dread of you will fall on every living creature on the earth, every bird of the air, every creature that crawls on the ground, and all the fish of the sea. They are delivered into your hand. 3
Everything that lives and moves will be food for you; just as I gave you the green plants, I now give you all things. 4But you must not eat meat with its lifeblood still in it.…"